Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1989-03-23
1990-03-06
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55 71, B01D 5322
Patent
active
049062565
ABSTRACT:
A membrane process for separating fluorinated hydrocarbon vapors is disclosed. The process employs a permselective membrane that is selectively permeable to fluorinated hydrocarbons over oxygen or nitrogen. The process involves contacting the feed side of the membrane with a gas mixture containing the fluorinated hydrocarbon vapor, and withdrawing from the permeate side a vapor enriched in the fluorinated hydrocarbon component. The driving force for membrane permeation is preferably provided by maintaining a partial vacuum on the permeate of the membrane. Eighty to 99% of the fluorinated hydrocarbon contained in the feedstream can be removed by the process. The permeate may be sufficiently enriched in fluorinated hydrocarbon to permit recovery and reuse. Very high membrane selectivities are not required.
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Ahlers Bernd
Baker Richard W.
Bell Carl-Martin
Wijmans Johannes G.
Farrant J.
Membrane Technology & Research Inc.
Spitzer Robert
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